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1. A soft yellowish or whitish emulsion of butterfat, water, air, and sometimes salt, churned from milk or cream and processed for use in cooking and as a food.
2. Any of various substances similar to butter, especially:
a. A spread made from fruit, nuts, or other foods: plum butter; cashew butter.
b. A vegetable fat having a nearly solid consistency at ordinary temperatures.
tr.v. but·tered, but·ter·ing, but·tersPhrasal Verb:
To put butter on or in.
To praise or flatter excessively: You're always buttering up the boss.
(Cookery) having had butter spread over or applied to it